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Hey all from Auburn Wa.

Hello My name is Josh I have a 2001 Forester L with an EJ25 Ive had it about 4 days now and I love the heck out of it but I'm having an issue...

When it sits for a little while like 3-5 hours or gets cold, especially in the morning.... it has a problem starting... the motor will crank 1,2,3 surge 4,5 then fire then run really high rpm with a rattle type noise then its fine... I'm not sure if surge is the right term for this but the motor pretty much stops turning and I dont get it and being an auto mechanic in the works I'm at a loss for thoughts of what it could be its only a starting issue with no driveability problems or codes thrown..

Could somebody shead some light onto a few things I could look at or at least a right dirrection to look in since search engines dont seam to do the trick

Thank you very much for your time and I look forward to talking with you all and becoming a forum friend of yours!

Sometimes cold starting issues on these subaru motors can be caused by a worn coolant temp sensor. There are a lot of engine temperature related fuel trim tables, so if that sensor is reading wrong when cold, that could be causing your cold start issues.

So i think i have found out a trick to temporarely fix the issue until further diagnosis can take place. If i prime the fuel pump two or three times before starting the car it seams to start alot better... Would this be typical to the engine coolant temp sensor going bad?